octacontagon is an 80-sided polygon
A 101-sided polygon is called a "hectacontakaihenagon." The name is derived from the Greek prefixes "hecta-" meaning 100, "contaka-" meaning 80, and "-gon" meaning angle. Therefore, a hectacontakaihenagon is a polygon with 101 sides and 101 angles.
The following are angles in a convex quadrilateral: Angle A = 80 degrees Angle B = 98 degree Angle C = 70 degrees What is the measure of the missing angle?
Well, isn't that just a happy little question! An 87-sided polygon is called an octacontaheptagon. Just imagine all those lovely angles and sides coming together in perfect harmony on your canvas of geometry. Remember, there are no mistakes in math, just happy little miscalculations waiting to be corrected.
An 80 sided shape is called a Octacontagon.
octacontagon is an 80-sided polygon
Exterior angle = 360/80 = 4.5 degrees. Interior angle = 180 - 4.5 = 175.5 degrees. And, a regular polygon has to be convex.
The formula for the size of the interior angle for a regular polygon is 180°(n-2)/n, where n is the number of edges, i.e. a whole number. If we set this equal to 80° then we get 180°(n-2)/n=80°180°n-360°=80°n100°n=360°n=3.6which isn't a whole number. So no regular polygon can have an interior angle of size 80°.
Octacontagon
A 101-sided polygon is called a "hectacontakaihenagon." The name is derived from the Greek prefixes "hecta-" meaning 100, "contaka-" meaning 80, and "-gon" meaning angle. Therefore, a hectacontakaihenagon is a polygon with 101 sides and 101 angles.
I find the name "30-sided polygon", "40-sided polygon", etc. just fine.
The following are angles in a convex quadrilateral: Angle A = 80 degrees Angle B = 98 degree Angle C = 70 degrees What is the measure of the missing angle?
70 and 80 degrees
Because the sum of the interior angles of a triangle must equal 180 degrees, the third angle must equal 180-80-60 = 40 degrees.
Well, isn't that just a happy little question! An 87-sided polygon is called an octacontaheptagon. Just imagine all those lovely angles and sides coming together in perfect harmony on your canvas of geometry. Remember, there are no mistakes in math, just happy little miscalculations waiting to be corrected.
If you meant x to be the third interior angle, x would equal 80, because the sum of all three interior angles of a triangle equals 180. So 80+50+50=180
180-100=80 degree angle